Re: nfs mounting problem in a linux cluster

[Steve Dickson <SteveD@redhat.com>]

Rajesh Kalmady wrote:
> I have a linux cluster with RHEL 4.1 installed in all nodes and the
> NFS servers too. I have a
> strange problem of NFS mounting. When I try to mount a file system
> from the NFS server  on
> to all nodes, I find that the mount hangs in some nodes, but works in
> others normally. I go to that node, kill the mount command and run it
> again, it works. The set of nodes where it
> does not work is also random.
> 
> I was doing this using a shell script which uses rsh to issue mount
> commands on the nodes,
> one by one. I thought that maybe the NFS server cannot handle rapid
> requests, so I put a
> sleep of 2 seconds between successive mount commands. But there was no
> change in
> the behavior.
> 
> After some diagnosing using tcpdump, I found that the mount client
> first contacts the
> RPC portmapper, then the NFS port and then the port where mountd is
> listening. In those
> machines where it does not work, I found that portmapper and nfs are
> contacted but after
> this, there is no progress.
hmm... is there anything in /var/log/messages describing the failure
(on either side)?

steved.


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